Individual
opals can vary widely in appearance and quality. As diverse as snowflakes or
fingerprints, each gem can differ noticeably from the next, even those from the
same mine. On the other hand, entire parcels of low-end opal can look virtually
identical.
An opal’s appearance
typically changes with lighting or viewing angle. A single opal can display a
shift in play-of-color and pattern, depending upon the time of day, the
weather, or the way the stone is tilted or turned. This changeable nature makes
it challenging for experts to classify and evaluate opal consistently. In
simplest terms, three aspects combine to create an opal’s unique beauty.
Color –
Background color and play-of-color
Patter –
Arrangement of play-of-color
Clarity –
Transparency and amount of inclusions
Photo: Duncan
Pay Courtesy: GIA. Resource: Amanda. #eClarity
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